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Length matching

Hey all,

I want to know wheather length matching is required for Termination resistor also which is shown in below figure, if required what is tolerance because i have 10 termination resistor when i am trying to match the length of all termination resistor i am getting nearly 300 mil difference between each signal.

Originally posted in cdnusers.org by prashanthkumar.tm

Termination.pdf

archive over 18 years ago

Prashanth:

You want to match the lengths from U1 to U2 for all signals. The distance to the pullup is not too critical. You might want to run some simulations to determine how much tolerance you have on it though.

Originally posted in cdnusers.org by Kalevi2
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archive over 18 years ago

Hey Kai Keskinen,

I matched the length from U1 to U2 for all signals, now when i am trying to match the Termination resistor length for 1000 mil nearly for 10 signals i am unable to match the length i am getting around 600 mil so i routed it for 600 mil and i am unable route same byte termination resistor in a single layer so i took few line in next layer.I want to know the method i followed is correct or not, if not what i have to do.

Originally posted in cdnusers.org by prashanthkumar.tm
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